Open AccessResearch application of K2CO3 activated coal coal and processing by HNO3 from cake shoulder to process Methylene Blue color
Author(s) -
Đào Minh Trung
Publication year - 2020
Publication title -
khoa học và công nghệ: trái đất và môi trường
Language(s) - English
Resource type - Journals
ISSN - 2588-1078
DOI - 10.32508/stdjsee.v4i1.534
Subject(s) - adsorption , methylene blue , activated carbon , macadamia nut , coal , carbon fibers , pyrolysis , chemistry , chemical engineering , waste management , carbonization , pulp and paper industry , materials science , nuclear chemistry , organic chemistry , composite material , food science , photocatalysis , composite number , engineering , catalysis
Macadamia is a tree that produces dried fruits, with each ton of macadamia seeds producing 70 - 77% of the shell. Annually, the grain processing companies in Vietnam produce thousands of tons of seeds and release tens of thousands of tons of shells. As the demand for macadamia nuts is constantly increasing in the market, more in-depth studies are needed to handle this agricultural residue. Macadamia shell has a higher surface area than other seed pods and their ash content is very low at only 0.22%, the cellulose content in the shell is about 41.2%, this shows that Macadamia shell has the potential to prepare activated carbon when burning at high temperatures. The activated carbon surface can be modified appropriately to change adsorption characteristics, forming different types of surface functional groups (oxygen functional groups, carbon surface functional groups, carbon functional groups, carbon - nitrogen, carbon - halogen) and make coal more suitable for special applications. Results of researching to prepare bio-denatured material from activated carbon K2CO3 by chemical method using HNO3 agent with optimal denaturing conditions such as concentration of 21%, denaturation time of 12 hours, degree MB adsorption reached 193.13 mg/g. The results of methylene blue adsorption adsorption tests at the optimal conditions show that at pH = 9.5 with the appropriate dose of coal is 1g/L in 120 minutes, it can be processed to reach 79.36% efficiency for water. Methylene Blue waste is 70 mg/L.